The simplest and most secure way to add an iframe in Joomla 1.7 is to use the Wrapper Module.
- In the Module Manager click New button in toolbar and select Wrapper.
- In the Position field type a new unique position name. We'll call it yourposition for the purpose of this tutorial.
- In Basic Options enter the URL to be loaded in the iFrame (and configure the rest of the Basic Options as preferred, Save Module.).
- In the Article, enter "loadposition yourposition" at the place where the iFrame should appear. This should be entered in text view, not HTML view and enclosed in curly brackets {}.
Troubleshooting:
- Some sites do not allow their pages to be included in iFrames.
- Make sure the Wrapper Module is enabled in the Module Manager and assigned to display on all pages or at least the page(s) required.
- Make sure the "Content - Load Modules" plugin is enabled in the Plugin Manager.
